CN216633436U

CN216633436U - Special clamp for machining shaft sleeve type parts

Info

Publication number: CN216633436U
Application number: CN202122568928.8U
Authority: CN
Inventors: 熊波; 胡赶生
Original assignee: WUHAN KYOWA SYNCHRONIZER RING CO Ltd
Current assignee: WUHAN KYOWA SYNCHRONIZER RING CO Ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-05-31
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to the technical field of shaft sleeve part processing, and discloses a special clamp for processing shaft sleeve parts, which comprises: a rotating mechanism comprising a reversible bridge plate; the inner clamping mechanism comprises an inner expanding type clamp, and the inner expanding type clamp is arranged on the bridge plate; and the outer clamping mechanism comprises a plurality of pushing mechanisms arranged along the circumferential interval of the inner expanding type clamp, each pushing mechanism comprises a pushing block and a pushing driving piece, and the pushing driving pieces drive the pushing blocks to be close to or far away from the inner expanding type clamp. The inner clamping mechanism and the outer clamping mechanism which are matched are adopted to synchronously clamp and fix the inner side and the outer side of the shaft sleeve type part, so that the clamping effect is effectively improved, the radial displacement of the shaft sleeve type part is limited, the roundness and the coaxiality of the processed shaft sleeve type part are ensured, and the processing quality of the part is improved.

Description

Special clamp for machining shaft sleeve type parts

Technical Field

The utility model relates to the technical field of shaft sleeve type part machining, in particular to a special clamp for shaft sleeve type part machining.

Background

With the continuous improvement of machining precision, the requirements on the tool clamp for part machining are higher and higher. Shaft sleeve parts (such as bearing bushes) generally have high requirements on roundness and coaxiality, and the three-jaw chuck type tool clamp of the conventional numerical control lathe cannot meet the high-precision machining requirements of the shaft sleeve parts. The clamp has the main defects that the clamping effect is poor, the clamped part is loose and tight, and the part is vibrated when being processed (such as the bearing bush part is split), so that the processed part can not meet the requirement of a product drawing.

SUMMERY OF THE UTILITY MODEL

The utility model provides a special clamp for machining shaft sleeve parts, which aims to solve the technical problem that the clamping effect of the existing clamp for machining the shaft sleeve parts is poor.

In a first aspect, the utility model provides a special fixture for machining a shaft sleeve part, comprising:

a rotating mechanism comprising a reversible bridge plate;

the inner clamping mechanism comprises an inner expansion type clamp, and the inner expansion type clamp is arranged on the bridge plate; and

outer fixture, include the edge a plurality of tight mechanisms that push away that interior expanding anchor clamps circumference interval set up, push away tight mechanism including push away tight piece and push away tight driving piece, push away tight driving piece drive push away tight piece and be close to or keep away from interior expanding anchor clamps.

Further, the internal expanding clamp includes:

the fixing piece is fixedly arranged on the bridge plate;

the movable piece is arranged on the fixed piece and is movably matched with the fixed piece; and

the expansion sleeve is fixedly arranged on the moving piece and moves along with the moving piece, and the expansion sleeve is extruded by the fixing piece and the moving piece to expand.

Preferably, the fixing member includes:

the fixing seat is a circular truncated cone seat structure with a central shaft provided with a mounting hole; and

The fixing sleeve is sleeved outside the fixing seat at intervals, and an annular space enclosed by the inner wall of the fixing sleeve and the outer wall of the fixing seat forms a deformation accommodating cavity;

the expansion sleeve is at least partially positioned in the deformation containing cavity.

The beneficial effect of above-mentioned preferred scheme is: because the expansion sleeve expands the back, it is to warping all around, and warp and hold the chamber and have the restriction effect to the deformation direction of expansion sleeve, make the power that the expansion sleeve acted on axle sleeve class part bigger, promote the centre gripping effect. In addition, when the expansion sleeve is in an unexpanded reset state, the deformation accommodating cavity can also be used as a positioning groove for placing parts, so that the part processing efficiency is improved.

Further, the movable member includes:

one end of the pull rod is arranged in the mounting hole, and the other end of the pull rod is connected with an internal expansion driving piece for driving the pull rod to move along the axial direction; and

the extrusion block component is fixedly sleeved on the pull rod;

wherein, the expansion sleeve is at least partially positioned between the extrusion block assembly and the fixed seat.

The beneficial effects of the above further scheme are: the deformation direction of the expansion sleeve is further limited through the action of the extrusion block assembly, so that the force acting on the shaft sleeve type part after the expansion sleeve is expanded is larger. In addition, the extrusion block assembly can also prevent the expansion sleeve from displacing relative to the pull rod, and the fixing effect of the expansion sleeve is ensured.

Preferably, the extrusion block assembly comprises a first extrusion block and a second extrusion block which are axially arranged along the pull rod in an abutting manner; the abutting end surfaces of the first extrusion block and the second extrusion block are matched inclined wedge surfaces.

The beneficial effect of above-mentioned preferred scheme is: through the effect of the first extrusion block and the second extrusion block which are in butt fit with the inclined wedge surfaces, the expansion sleeve is subjected to outward inclined component force while being subjected to axial extrusion force along the pull rod, the contact area of the extrusion block assembly on the expansion sleeve is increased, the expansion sleeve is extruded towards the shaft sleeve type part, and the clamping effect is improved.

Further, the fixing piece also comprises a base; the fixing seat is installed on the base.

Preferably, the pushing mechanism further comprises:

the fixed block is provided with a sliding groove arranged along the radial direction of the expansion sleeve and is arranged on the base;

the pushing block is installed on the sliding groove, and the end face, opposite to the expansion sleeve, of the pushing block is an arc face.

Further, the special fixture further comprises a supporting seat, the supporting seat is installed on the bridge plate, and the base is installed on the supporting seat.

Preferably, the rotating mechanism further comprises:

A base plate;

the four-axis rotary table is arranged at one end of the bottom plate and connected with one end of the bridge plate to drive the bridge plate to rotate; and

and the tail seat is arranged at the other end of the bottom plate relative to the four-axis rotary table, and is connected with the other end of the bridge plate.

Furthermore, a plurality of clamp assemblies are arranged on the bridge plate at intervals, and each clamp assembly comprises one inner clamping mechanism and one outer clamping mechanism.

The beneficial effects of the above further scheme are: through set up a plurality of anchor clamps subassemblies on the bridge plate, can the synchronous construction of a plurality of axle sleeve class parts of centre gripping back, improve the machining efficiency of axle sleeve class part greatly.

The technical scheme provided by the utility model has the beneficial effects that:

1. an internal expanding type clamp is used as an internal clamping mechanism, and shaft sleeve type parts are preliminarily clamped and fixed; a plurality of tight mechanisms that push away that the adoption set up along interior expanding anchor clamps circumference interval are used as outer fixture with the cooperation of interior clamping mechanism and are used for further pressing from both sides tight fixedly with axle sleeve class part, have effectively promoted the centre gripping effect.

2. The outer clamping mechanism is matched with the inner clamping mechanism, so that the radial displacement of the shaft sleeve type parts is limited, the roundness and the coaxiality of the processed shaft sleeve type parts are ensured, and the quality of part processing is improved.

3. The plurality of pushing mechanisms of the outer clamping mechanism keep intervals, and under the cooperation of the rotating mechanism, the side face cutting machining holes and the splitting of the shaft sleeve type parts are very convenient, the machining efficiency is improved, the split shaft sleeve type parts are still in a clamping state respectively, the structural deformation of the parts caused by the side hole machining or the splitting machining is reduced, and the machining quality of the parts is further guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective structural view of a special fixture for machining a shaft sleeve part according to an embodiment of the present invention;

FIG. 2 is an enlarged perspective view of one of the gripper assemblies of FIG. 1;

FIG. 3 is a schematic top view of the structure of FIG. 2;

FIG. 4 is a schematic front view of the structure of FIG. 3;

FIG. 5 is a schematic sectional view A-A of FIG. 3.

In the figure:

10. a rotation mechanism; 11. a base plate; 12. a bridge plate; 13. a four-axis turntable; 14. a tailstock;

20. a supporting seat;

30. an inner clamping mechanism; 31. a fixing member; 311. a fixed seat; 312. a base; 313. fixing a sleeve; 32. a movable member; 321. a pull rod; 322. an extrusion block assembly; 322a, a first extrusion block; 322b, a second extrusion block; 33. expanding the sleeve;

40. an outer clamping mechanism; 41. a pushing block; 42. a fixed block; 421. a chute.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment of the utility model provides a special clamp for machining shaft sleeve parts, which can solve the technical problems that the existing clamp for machining shaft sleeve parts is poor in clamping effect and not beneficial to improving the part machining efficiency.

Referring to fig. 1, a special fixture for machining a shaft sleeve part includes: a rotating mechanism 10, a supporting base 20, an inner clamping mechanism 30 and an outer clamping mechanism 40. The shaft sleeve part in this embodiment takes the bearing bush to be split, and of course, the special fixture of this embodiment may also be applied to other shaft sleeve parts.

The rotating mechanism 10 includes a base plate 11, a bridge plate 12, a four-axis turntable 13, and a tailstock 14.

The bottom plate 11 of the present embodiment is horizontally disposed. A four-axis turn table 13 is provided at one end of the bottom plate 11, and a tailstock 14 is provided at the other end of the bottom plate 11 with respect to the four-axis turn table 13. The bridge plate 12 is installed between the four-axis rotary table 13 and the tailstock 14. Specifically, one end of the bridge plate 12 in the longitudinal direction is connected to the four-axis turn table 13, and the other end of the bridge plate 12 in the longitudinal direction is connected to the tailstock 14. The four-shaft rotary table 13 drives the bridge plate 12 to turn. The four-axis turntable 13 in this embodiment is an existing device.

Three clamp assemblies are arranged on the bridge plate 12 at intervals along the length direction of the bridge plate, each clamp assembly comprises an inner clamping mechanism 30 and an outer clamping mechanism 40, and each clamp assembly also comprises a supporting seat 20. The support base 20 is mounted on the bridge plate 12. Each support base 20 is provided with an inner clamping mechanism 30 and an outer clamping mechanism 40. It should be noted that more clamp assemblies may be provided on the bridge plate 12 as desired.

Referring to fig. 2-5, each of the internal clamp mechanisms 30 includes an internal expansion clamp. Each outer clamping mechanism 40 includes four pushing mechanisms arranged at even intervals along the circumferential direction of the inner expanding type clamp.

Specifically, the internal expanding clamp includes a fixed member 31, a movable member 32, and an expanding sleeve 33.

The fixing member 31 is fixedly installed on the bridge plate 12. The movable member 32 is disposed on and movably engaged with the fixed member 31. The expansion sleeve 33 is fixedly arranged on the movable piece 32 and moves along with the movable piece 32, the expansion sleeve 33 is pressed by the fixed piece 31 and the movable piece 32 to be in an expanded state, and the expansion sleeve 33 is in a reset state when not pressed.

The fixing member 31 includes a fixing base 311, a base 312 and a fixing sleeve 313.

The fixing base 311 is a circular truncated cone base structure, and a mounting hole is coaxially formed at a center axis thereof. The outer diameter of the top end of the fixing seat 311 is smaller than the outer diameter of the bottom end thereof, and an outer wall of the fixing seat near the top end is provided with an outer diameter gradual change section wall surface with the outer diameter gradually increasing from the top end to the bottom end.

The fixing base 311 is mounted on the base 312. The base 312 is mounted on the support base 20.

The fixing sleeve 313 is sleeved outside the fixing seat 311 at intervals, and an annular space enclosed by the inner wall of the fixing sleeve 313 and the outer wall of the fixing seat 311 forms a deformation accommodating cavity.

Moveable member 32 includes a pull rod 321 and a squeeze block assembly 322.

The pull rod 321 is coaxially matched with the mounting hole and the expansion sleeve 33. One end of the pull rod 321 is arranged in the mounting hole and is in threaded connection with the fixed seat 311, and the other end of the pull rod 321 is provided with a nut and is connected with an internal expansion driving piece for driving the pull rod to move along the axial direction through the nut. The internal expansion driving piece in the embodiment is an existing device, such as an electric drill, a pneumatic wrench and the like. The workpiece of the internal expansion drive (e.g., the drill bit of a power drill) engages the nut to drive the rotation of the pull rod 321.

The extrusion block assembly 322 includes a first extrusion block 322a and a second extrusion block 322b disposed axially opposite each other along the pull rod 321. The abutting end surfaces of the first extrusion block 322a and the second extrusion block 322b are wedge surfaces which are matched with each other. The first extrusion 322a is arranged at the end of the second extrusion 322b facing away from the expansion sleeve 33. The first pressing block 322a is fixedly connected to the pull rod 321. The second extrusion block 322b is slidably connected to the top end of the expansion sleeve 33.

The expansion sleeve 33 is located between the second extrusion block 322b and the fixing seat 311, and is fixed to the pull rod 321. The bottom end of the expansion sleeve 33 is located in the deformation accommodation cavity.

Because the pull rod 321 is in threaded connection with the fixed seat 311, the internal expansion driving element drives the pull rod 321 to rotate, and the pull rod 321 is in threaded fit with the fixed seat 311 to realize axial movement.

For example, when the pull rod 321 moves towards the support base 20, the first extrusion block 322a is driven to extrude the second extrusion block 322b, the second extrusion block 322b extrudes the expansion sleeve 33, and the expansion sleeve 33 deforms and expands to abut against the inner wall of the bearing bush.

When the pull rod 321 moves in the opposite direction, i.e. away from the support base 20, the second pressing block 322b resets to release the pressure applied to the expansion sleeve 33, and the expansion sleeve 33 resets to maintain a distance from the inner wall of the bearing bush.

Each of the pushing mechanisms includes a pushing block 41, a fixing block 42, and a pushing driving member that drives the pushing block 41 to approach or separate from the expansion sleeve 33.

The fixed block 42 is mounted on the base 312, and the fixed block 42 is provided with a sliding groove 421 arranged along the radial direction of the expansion sleeve 33.

The pushing block 41 is installed on the sliding groove 421, and the end face of the pushing block 41 facing the expansion sleeve 33 is an arc surface so as to be better attached to the outer wall of the bearing bush.

The pushing driving component can be an air cylinder or an oil cylinder, and an oil path and air path distributor component corresponding to the air cylinder or the oil cylinder is arranged on the outer side surface of the tailstock 14. The driving member for pushing tightly in this embodiment is preferably a cylinder, and when the axle shoe needs to be clamped, the cylinder drives the pushing block 41 to move along the sliding groove 421 towards the direction of the expanding sleeve 33. When the bearing bush needs to be loosened, the oil cylinder drives the pushing block 41 to move reversely.

When the front surface of the bearing bush needs to be cut, the special fixture of the embodiment is used for clamping the bearing bush, and the four-axis rotary table 13 rotates by 0 degree, that is, the bridge plate 12 is in a horizontal state.

When the side surface of the bearing bush needs to be subjected to hole cutting or cutting and splitting, the four-axis rotary table 13 rotates by 90 degrees. After the bearing bush is cut and split into two parts, the bearing bush is still in a clamped state. After the pushing and driving member loosens the pushing and driving block 41, the split bearing bush can be removed and the next batch of bearing bushes to be processed can be replaced.

The embodiment has the advantages that the bearing bush is always in a clamping state during machining, and particularly, the bearing bush cannot be relatively deformed during the split machining, so that the machining quality of the bearing bush is ensured.

In addition, the special fixture of this embodiment can a plurality of axle bushes of centre gripping single to in step carry out subdivision processing to a plurality of axle bushes, improved axle bush batch construction efficiency.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above description is merely illustrative of particular embodiments of the utility model that enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a special fixture for shaft sleeve class parts machining which characterized in that includes:

a rotating mechanism comprising a reversible bridge plate;

the inner clamping mechanism comprises an inner expanding type clamp, and the inner expanding type clamp is arranged on the bridge plate; and

2. The special fixture for machining the shaft sleeve type part as claimed in claim 1, wherein the internal expansion type fixture comprises:

the fixing piece is fixedly arranged on the bridge plate;

the movable part is arranged on the fixed part and is movably matched with the fixed part; and

3. The special fixture for machining the shaft sleeve type part as claimed in claim 2, wherein the fixing member comprises:

4. A special fixture for machining shaft sleeve type parts as claimed in claim 3, wherein the movable member comprises:

the extrusion block component is fixedly sleeved on the pull rod;

5. The special clamp for machining the shaft sleeve type part as claimed in claim 4, wherein the extrusion block assembly comprises a first extrusion block and a second extrusion block which are arranged in an axially abutting mode along the pull rod; the abutting end surfaces of the first extrusion block and the second extrusion block are matched wedge surfaces.

6. The special fixture for machining the shaft sleeve type part as claimed in claim 3, wherein the fixing member further comprises a base; the fixing seat is installed on the base.

7. The special fixture for machining the shaft sleeve type part according to claim 6, wherein the pushing mechanism further comprises:

the fixed block is provided with a sliding groove which is arranged along the radial direction of the expansion sleeve and is arranged on the base;

8. The special fixture for machining the shaft sleeve type part as claimed in claim 7, wherein the special fixture further comprises a supporting seat, the supporting seat is mounted on the bridge plate, and the base is mounted on the supporting seat.

9. The special fixture for machining the shaft sleeve type part according to any one of claims 1 to 8, wherein the rotating mechanism further comprises:

a base plate;

the four-axis rotary table is arranged at one end of the bottom plate and is connected with one end of the bridge plate to drive the bridge plate to rotate; and

and the tailstock is arranged at the other end of the bottom plate relative to the four-axis rotary table and is connected with the other end of the bridge plate.

10. The special fixture for machining the shaft sleeve type part as claimed in claim 9, wherein a plurality of fixture assemblies are arranged on the bridge plate at intervals, and each fixture assembly comprises one inner clamping mechanism and one outer clamping mechanism.